Seasonic Focus GX-850 ATX 3.1
Seasonic Focus GX-850 ATX 3.1
The Seasonic Focus GX-850 PC power supply delivers stable and efficient power to modern computer builds. With a total output of 850W and 80 PLUS Gold certification, it operates with high efficiency, which limits waste heat generation and reduces running costs. The fully modular cabling system simplifies case interior organisation and promotes unrestricted airflow for better cooling. Thanks to full compliance with ATX 3.1 and PCIe 5.1 standards, this PSU is ready for the high energy demands of modern graphics cards and processors. In addition, its compact 140mm depth makes it easy to install in most standard cases, leaving plenty of room for cable management.
850W
Power
ATX
Form factor
80 PLUS Gold
Certification
Fully
Modularity
Key technologies of the Seasonic Focus GX-850 ATX 3.1 PC power supply
- 850W output powers even high-performance gaming rigs
- 80 PLUS Gold certification confirms high efficiency
- Fully modular cabling simplifies installation and improves airflow
- Support for ATX 3.1 and PCIe 5.1 standards powers modern components
- Digital hybrid control maintains quiet operation under light loads
- OptiSink technology efficiently dissipates heat from internal components
- Compact depth simplifies installation in smaller cases
Choosing a power supply
When choosing a suitable PC power supply, the key parameter besides the form factor is its power output. This indicates the maximum number of watts the power supply can continuously deliver to the components in the computer. It is a good idea to use a web-based calculator to work out the optimal power output based on your chosen components.
ATX 3.1 and PCIe 5.1 standards and 80 PLUS Gold efficiency
The power supply is fully compliant with ATX 3.1 and PCIe 5.1 specifications, which gives it the ability to handle the energy demands of modern components. These standards define resistance to short-term, high-power draws typical of powerful graphics cards. It therefore includes a native 16-pin 12V-2x6 connector for direct power delivery. This ensures a stable supply for current and future graphics accelerators without the need for adapters. The 80 PLUS Gold certification confirms the PSU's high efficiency, which reaches 90% at 50% system load. At a lower 20% and full 100% load, it maintains an efficiency of 87%.
OptiSink technology and easy installation
The modern printed circuit board (PCB) design and modified layout of internal components with OptiSink technology increase the internal space for heat dissipation. This design solution uses smaller MOSFET transistors and heatsinks, improving overall thermal conductivity and cooling. More effective heat dissipation directly results in higher reliability and an extended service life for all the PSU's electronic components. With a depth of just 140mm, this ATX power supply fits easily into a wide range of computer cases, including smaller models. Its smaller dimensions provide more free space for handling and simplify cable management, even in builds where internal space is more limited.
Six-fold component protection and fan
The power supply integrates six key protection mechanisms for the safe operation of all connected components. These include over-voltage, under-voltage, over-current, overload, short-circuit, and over-temperature protection. This comprehensive protection system actively monitors electrical values and, in the event of an anomaly, immediately cuts the power to prevent damage to your motherboard, processor, or graphics card. The PSU uses a large 135mm fan fitted with a fluid dynamic bearing (FDB). This allows the fan to run very quietly and gives it a long service life, rated at 50000 operating hours.
Long-term operational reliability and connectivity
The use of proven components, advanced OptiSink cooling, and comprehensive protections contributes to the high reliability of the power supply. The design and choice of materials reflect a focus on long-term, stable operation, which is also confirmed by the Mean Time Between Failures (MTBF) of 100000 hours. The design of the Seasonic Focus GX-850 provides consistent performance for many years, even under high load. In addition to the main power cables and the 16-pin 12V-2x6 connector, the PSU offers a sufficient number of peripheral connectors for complex builds. Two separate CPU 4+4-pin connectors, three PCIe 6+2-pin connectors, eight SATA connectors, and three Molex connectors are available, with no need for adapters.
Connectors
- 1× ATX 24-pin
- 2× CPU 4+4-pin
- 3× PCI-E 6+2-pin
- 1× 12V-2x6 16-pin
- 8× SATA 15-pin
- 3× Molex 4-pin
Package contents
- PC power supply
- Mounting screws
- User manual
- 1× ATX 24-pin
- 2× CPU 4+4-pin
- 3× PCI-E 6+2-pin
- 1× 12V-2x6 16-pin
- 2× SATA
- 1× Molex 4-pin
80 Plus certification in the European market
The 80 Plus certification was created to objectively evaluate the efficiency of computer power supplies. This gives users a simple and clear way to compare different models. On the European market (where a voltage of 230V is used), there are six levels of 80 Plus certification with set requirements for computer power supplies. Higher energy efficiency primarily means lower energy consumption.
| PC power supply load | Efficiency at 20% load | Efficiency at 50% load | Efficiency at 100% load |
|---|---|---|---|
| 80 PLUS | 82% | 85% | 82% |
| 80 PLUS Bronze | 85% | 88% | 85% |
| 80 PLUS Silver | 87% | 90% | 87% |
| 80 PLUS Gold | 90% | 92% | 89% |
| 80 PLUS Platinum | 92% | 94% | 90% |
| 80 PLUS Titanium | 94% | 96% | 94% |
Specifications
Performance and format
Equipment
Efficiency
Connectors
Cooling system
Dimensions
| Code: | UEfga3a4 |
| Warranty: | 120 months |
| Links: | Producer's Website: |
| Manufacturer information |
Sea Sonic Europe BV, Rietveld 7, 5258 ED Berlicum, Netherlands [email protected] 
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